71776

Appears in sequences

• Expansion of 1/(1-4*x-x^3).at n=8A052927
• Number of compositions (ordered partitions) of n where no pair of adjacent part sizes is relatively prime.at n=34A178470
• Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 3 5 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 3 5 6 or 7.at n=21A252378
• One half of numbers representable in at least two different ways as sums of four nonvanishing cubes. See A259060 for these numbers and their representations.at n=23A261241
• The second Zagreb index of the Aztec diamond AZ(n) (see the Ramanes et al. reference, Theorem 2.2).at n=32A292345
• Number of permutations (p(1),p(2),...,p(n)) of (1,2,...,n) such that p(i)-i is in {-2,-1,4} for all i=1,...,n.at n=41A376743
• a(n) = 2*n^3 - 3*n + 1.at n=33A377663